<?php
	define("SP","sess_");
	class Session
	{
		public static function set($key, $val)
		{
			$_SESSION[SP.$key] = $val;
		}
		public static function get($key)
		{
			if(isset($_SESSION[SP.$key]))
			{
				return $_SESSION[SP.$key];
			}
			return null;
		}
		public static function start()
		{
			session_start();
		}
		public static function destroy()
		{
			session_destroy();
		}
	}
?>